JWT Decoder
Decode JSON Web Tokens (JWT) to see their header and payload.
How to use
- 1Paste your encoded JWT string into the input field.
- 2The tool will automatically decode and display the Header and Payload JSON.
- 3Note: Decryption is not possible without the secret key; this tool only decodes.
Frequently Asked Questions
Is my data secure?
Yes. This tool runs entirely in your browser. Your data is never sent to our servers or stored anywhere.
Can I use this for large files?
Most browser-based processing can handle up to several megabytes. For extremely large files, we recommend using dedicated CLI tools or Web-based software.